the world > space > relative position > closed or shut condition > [adjective] > stopping up or blocking > having no openings > not pierced, punctured, etc. > not able to be
unpierceablec1480
unthirlable1483
impierceable1532
imperforable1658
unpuncturable1891
1483 Cath. Angl. 383 Vn Thyrleabylle, jnpenetrabilis.
This entry has not yet been fully updated (first published 1926; most recently modified version published online June 2019).